diff options
| author |   Markus Pargmann <mpa@pengutronix.de> | 2013-10-29 09:19:23 +0100 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-10-29 16:58:18 -0700 |
| commit | 7cf1a122b2f3bda5af837a2dbd7564f695301af0 (patch) | |
| tree | fad1ce6ff0303e49852d15ce958cc7f10e31c341 /drivers/w1 | |
| parent | uio: Pass pointers to virt_to_page(), not integers (diff) | |
| download | linux-dev-7cf1a122b2f3bda5af837a2dbd7564f695301af0.tar.xz linux-dev-7cf1a122b2f3bda5af837a2dbd7564f695301af0.zip | |
w1-gpio: Detect of_gpio_error for first gpio
The first DT gpio is necessary for this driver, but errors returned for
of_get_gpio are ignored.
This patch adds a return value check for the first of_get_gpio.
Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/w1')
| -rw-r--r-- | drivers/w1/masters/w1-gpio.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/w1/masters/w1-gpio.c b/drivers/w1/masters/w1-gpio.c index f54ece268c98..ae53e8832845 100644 --- a/drivers/w1/masters/w1-gpio.c +++ b/drivers/w1/masters/w1-gpio.c @@ -58,6 +58,7 @@ static int w1_gpio_probe_dt(struct platform_device *pdev) { struct w1_gpio_platform_data *pdata = pdev->dev.platform_data; struct device_node *np = pdev->dev.of_node; + int gpio; pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); if (!pdata) @@ -66,7 +67,11 @@ static int w1_gpio_probe_dt(struct platform_device *pdev) if (of_get_property(np, "linux,open-drain", NULL)) pdata->is_open_drain = 1; - pdata->pin = of_get_gpio(np, 0); + gpio = of_get_gpio(np, 0); + if (gpio < 0) + return gpio; + pdata->pin = gpio; + pdata->ext_pullup_enable_pin = of_get_gpio(np, 1); pdev->dev.platform_data = pdata; |